Mysql下载
https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.26-linux-glibc2.12-x86_64.tar.gz
Mysql版本：5.7.26
Mysql安装方式：二进制
多实例的应用
1、准备多个目录
mkdir -p /mysql/330{7,8,9}/data
2、准备配置文件
cat > /mysql/3307/my.cnf <<EOF
[mysqld]
basedir=/application/mysql #mysql安装路径
datadir=/mysql/3307/data #mysql数据存放目录
socket=/mysql/3307/mysql.sock #mysql的socket
log_error=/mysql/3307/mysql.log
port=3307
server_id=7
log_bin=/mysql/3307/mysql-bin
EOF
cat > /mysql/3308/my.cnf <<EOF
[mysqld]
basedir=/application/mysql
datadir=/mysql/3308/data
socket=/mysql/3308/mysql.sock
log_error=/mysql/3308/mysql.log
port=3308
server_id=8
log_bin=/mysql/3308/mysql-bin
EOF
cat > /mysql/3309/my.cnf <<EOF
[mysqld]
basedir=/application/mysql
datadir=/mysql/3309/data
socket=/mysql/3309/mysql.sock
log_error=/mysql/3309/mysql.log
port=3309
server_id=9
log_bin=/mysql/3309/mysql-bin
EOF
3、初始化三套数据
mysqld --initialize-insecure --user=mysql --datadir=/mysql/3307/data --basedir=/application/mysql
mysqld --initialize-insecure --user=mysql --datadir=/mysql/3308/data --basedir=/application/mysql
mysqld --initialize-insecure --user=mysql --datadir=/mysql/3309/data --basedir=/application/mysql
4、systemd管理多实例
cd /etc/systemd/system
cp mysqld.service mysqld3307.service
cp mysqld.service mysqld3308.service
cp mysqld.service mysqld3309.service
vim mysqld3307.service
ExecStart=/app/mysql/bin/mysqld --defaults-file=/mysql/3307/my.cnf
vim mysqld3308.service
ExecStart=/app/mysql/bin/mysqld --defaults-file=/mysql/3308/my.cnf
vim mysqld3309.service
ExecStart=/app/mysql/bin/mysqld --defaults-file=/mysql/3309/my.cnf
5、授权
chown -R mysql.mysql /mysql/*
6、启动
systemctl start mysqld3307.service
systemctl start mysqld3308.service
systemctl start mysqld3309.service
7、验证多实例
netstat -lnp|grep 330
mysql -S /mysql/3307/mysql.sock -e "select @@server_id"
mysql -S /mysql/3308/mysql.sock -e "select @@server_id"
mysql -S /mysql/3309/mysql.sock -e "select @@server_id"
